La Quinta Formation, Mexico
La Quinta Formation is a geological formation in Chiapas, Simojovel in Mexico, deposited during the Late Oligocene into the early Miocene. It is the oldest known formation where Mexican amber can be found. It underlies the Mazantic Shale.
Paleobiota
Insecta
| Genus | Species | Notes | Images |
| Hyptia | * H. deansi | Ensign wasp. | |
| Schwenckfeldina | * S. archoica | Fungus gnat. | |
| Mastotermes | * M. electromexicus | Termite. | |
| Termitaradus | * T. protera | Termite bug. | |
| Aphaenogaster | * A. praerelicta | Ant. | |
| Dicromantispa | * D. electromexicana | Mantidfly. | |
| Leptopharsa | * L. tacanae | Lace bug. |
Flora
| Genus | Species | Notes | Images |
| Hymenaea | H. mexicanaH. allendis | Legume fabacids. | |
| Simojoflorum | * S. mijangosii | Mimosoid fabacid. |